Study of contrast sensitivity of different intraocular lens after cataract surgery
- VernacularTitle:白内障术后不同人工晶状体对比敏感度的研究
- Author:
Renfeng XU
;
Zhenping HUANG
;
Liping YANG
- Publication Type:Journal Article
- Keywords:
Contrast sensitivity;
Intraocular lens;
Cataract
- From:
Journal of Medical Postgraduates
2003;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:Contrast sensitivity(CS) is a new technique which measures the discrimination capacity of the human eye to an object under low contrast conditions.It is more acute and more complete in reflecting visual function than the Snellen chart which is used to test the discrimination under high contrast conditions.Our purpose is to compare the effect of an aspheric intraocular lens(IOL) with those of conventional monofocal silicone and acrylic IOL and multifocal IOL on functional visual performance. Methods:To 90 eyes after phaco emulsification with IOL implantation,30 eyes of age-matched patients were selected as control,all patients were 50-80 years old,with no disorders,other than cataract,known to affect CS.Corrected visions were all over 0.8.The CS was measured 30 days after surgery.Results:After surgery the patients' CS returned to the normal level,but which was lower than that of the control's.The aspheric IOL provided statistically significant better contrast sensitivity at 6,12 and 18 cycles per degree. Conclusion:The use of a modified prolate IOL in cataract surgery has the potential to improve CS,which is designed to partially compensate the average spherical aberration of the cornea.
